Nut-lock.



' LQMQ ROBERTS,

NUT LOCK. APPLICATION FILED rguiza. 1911.

Patented Apr. 23, 1918.

awue/wtoz LEE M. ROBERTS, 0F BURKE, IDAHO.

NUT-LOCK.

l,2ti3,932.

Specification of Letters Patent. Patentqedl Ap1323, 191%.

Application filed. February 23, 1917. Serial No. 150,480.

To all whom it may concern:

Be it known that 1, LEE M.Ro13nn'rs, a citizen of the United States, residing at Burke, in the county of Shoshone and State of Idaho, have invented certain useful Improvements in Nut-Locks, of which the following. is a specification, reference being had therein to the accompanying drawing.

The present invention has reference generally to improvements in nut locks and more particularly relates to a nut lock of a combined bolt and nut type.

The invention has for its particular obj ect to provide novel locking means mounted on the nut for engagement with the bolt to prevent retrograde movement of the nut on the bolt.

It is an additional and equally important object of the present invention to provide a novel operating member for releasably holding the locking means out of engagement with the bolt when desired,resilient means cooperating with the locking means for antomatically placing the locking means in engagement with the bolt simultaneouslywith the release of the operating means.

Among the other aims and objects of the present invention may be recited the pro- ..vision of a device of the character mentioned with a view to compactness, and in which the number of parts are few, the construc tion simple, the cost of production low and the efiiciency high.

Other objects as well as the nature, characteristic features and scope of this invention will be more readily apparent from the following description taken in connection with the accompanying drawings and pointed out in the claim forming a part of this specification.

The invention is clearly illustrated in the accompanying drawings, in which Figure 1 is a transverse section taken through the nut, the bolt and the locking means being shown in elevation.

Fig. 2 is a perspective detail of the nut.

Fig. 3 is a fragmentary perspective detail of the nut with the operating member removed to show the construction of the recess in the nut.

Fig. 4 is a perspective detail of the looking pawl and the operating member.

Similar characters of reference are employed in all of the above described views, to indicate corresponding parts.

Referring now, more particularly, to the accompanying drawings I provide a bolt the shank 1 of which has a head 2 formed on one end while the opposite end is threaded as at 3 and provided with a plurality of longitudinally extending grooves 4. These grooves have radially arranged faces 5 and slanting faces 6 for a purpose that will presently appear. A nut 7 is now threaded on the bolt through the medium of the usual threaded opening 8.

With a view toward providing my improved locking' means for holding the nut against accidental retrograde movement on the bolt I have provided the threaded opening of the nut with a horizontal recess 9 and have pivotally mounted therein through the medium of a longitudinally extending pin 10 a bolt 11 the pivoted end being arranged adjacent the narrow end of the recess while the opposite or engaging end of the pawl is curved as indicated by the numeral 12 and is arranged to engage one of the grooves 4c in the boltso'that the free edge of the pawl abuts the radial face 5 thereof to prevent retrograde movement of the nut on the bolt.

In order to remove the pawl from engagement with the bolt I have provided the corresponding outer side edge of the nut with a recess 13 in the bottom of which is provided a transverse groove 14 while an opening 15 extends transversely through the nut and establishes communication with the enlarged end of the recess 9. An operatin element or finger piece 16 has a shank 1 extending therefrom and arranged in the opening 15, the free end being swiveled as at 18 and the pawl adjacent the engaging end thereof. The head of the finger piece is arranged for turning movement in the recess 13 and when the head is arranged in the groove 14 the pawl is maintained in yielding engagement with the groove by a coil spring 19 the respective ends of which the spring will automatically replace the pawl.

i The operation of the present invention may be reviewed as follows:

Assuming that the parts have been assembled in the manner described and that the pawl is retained within the recess 9 by the finger piece subsequent to adjusting the nut in the proper position on the bolt, the head of the anger piece is rotated to aline wan the groove 14 whereupon it is released and owing to the tension of the spring 19 against the pawl the engagingend thereof is pressed into yielding engagement with theadjaeent groove 4 and-the b'olt-and-the'reby pre'ven ts retrograde n'iovem'ent of the nut on the bolt.

- It will be understood that the above description and accompanying drawings com-- prehen'd only th'e general and preferred ernbodiment of my invention-and that various minor changes detail of cjonstructiomiproportion-and arrangement of the parts may its threaded periphery, comprising a nut body having a threaded opening therein for engagement with theboltand provided with a recess extending inwardly from the opening-and also provided with a circular recess on the corresponding outer side face thereof and having a transverse groove in the inner end thereof, the body being further provided with a transverse opening establish-- ing communication between the recesses, a pawl pivotally mounted adjacent one end of the inner recess, a coil spring having its respective ends bearing against the engaging end of the pawl and against the inner end of the inner recess for normally holding the engaging end of the pawl in the longitudinally grooved threadedperiphery of the l belt, a finger piece including a head and shank, the shank being slidably arranged through the transverse opening and th rough the coil spring for supporting the latter and having its inner end swiveled to the engaging end'of the pawl, and the head being ofa, height equal to the depth of the outer recess and normally arranged partially in the groove in the outer recess and partially in the outer recess but adapted to be withdrawn from the groove against the tension of the spring and partially rotated so as to engage the inner end of the outer recess and lie flush with the outer face of the nut to consequently remove and hold the pawl from engagement with the bolt.

In testimony whereof I afhx my signature.

LEE M. ROBERTS.

boplesot this patent may be obtained iorfive cents each, "byaddressing the commissioner of Patents,

. wsshtngtomflwc." 

